package com.itheima.jobs;

import com.itheima.constant.RedisConstant;
import com.itheima.utils.QiniuUtils;
import org.springframework.beans.factory.annotation.Autowired;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;

import java.util.Set;

/**
 * 自定义Job,实现定时清理垃圾图片
 */
public class ClearImgJob {
    @Autowired
    private JedisPool jedisPool;

    private void clearImg() {
        Jedis jedis = jedisPool.getResource();
        //根据Redis中保存的两个set集合进行差值计算，获得垃圾图片名称集合
        Set<String> set = jedis.sdiff(RedisConstant.SETMEAL_PIC_RESOURCES,RedisConstant.SETMEAL_PIC_DB_RESOURCES);
        if(set != null && set.size() >0){
            for (String imgName : set) {
                //删除七牛云服务器上的图片
                QiniuUtils.deleteFileFromQiniu(imgName);
                System.out.println("定时任务,删除图片从七牛云:"+imgName);
                //从Redis集合中删除图片名称
                jedis.srem(RedisConstant.SETMEAL_PIC_RESOURCES,imgName);
                System.out.println("定时任务,移除数据从Redis上:"+imgName);
            }
        }
        jedis.close();
    }
}
